1. of or relating to the gums. 
   属于或与牙龈、牙床有关。
2. A small boil or abscess on the gum, often resulting from tooth decay. 
   龈脓肿牙床上生的小疖或肿块，常由龋牙引起
3. The firm connective tissue covered by mucous membrane that envelops the alveolar arches of the jaw and surrounds the bases of the teeth. 
   龈，牙床覆盖着粘膜的坚韧的连接组织，包裹颚上的弓形牙槽及牙根部
4. Purulent inflammation of the gums and tooth sockets, often leading to loosening of the teeth. 
   牙槽脓溢牙龈和牙床的化脓性发炎，经常导致牙齿的松动
5. The gums are swollen. 
   牙床都肿了。

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• 4. base of the teeth
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